Transfer feed assembly



Dec. 5, 1961 J. c. DANLY ETAL 3,011,464

TRANSFER FEED ASSEMBLY v Filed March 22, 1956 8 Sheets-Sheet 1 il l Affl :l

Dec. 5, 1961 Filed March 22. 1956 J. C. DANLY ET AL TRANSFER FEEDASSEMBLY 8 Sheets-Sheet 2 L/we o o lo o| o o G can; 0| rE-:lr-*mpol /loifm JHMES C. DANLY Vqs/ GEO/QGEFF BY LQQM A ORNEY Dec. 5, 1961 J. c.DANLY ETAL TRANSFER FEED ASSEMBLY S DHA/LY GEOQGEFF RNEY `22a/wes Ves/LBY Dec. 5, 1961 J, c. DANLY ETAL TRANSFER FEED ASSEMBLY 8 Sheets-Sheet 4Filed March 22, 1956 F sw R G Y CNR E mm@ m w @i3 mC A su.

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TRANSFER FEED ASSEMBLY 8 Sheets-Sheet 5 Filed March 22. 1956 INVENToRsDHA/LY RE/:F

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Dec. 5, 1961 Filed March 22, 1956 J. C. DANLY ET AL TRANSFER FEEDASSEMBLY 8 Sheets-Sheet 6 INVENTORS J/wfs C. DANLY Ves/ Geo/QGEFF AORNEY BY LEM Dec. 5, 1961 J; c. DANLY ET AL 3,011,464

TRANSFER FEED ASSEMBLY 8 sheets-sheet 'r Filed March 22, 1956 FTEMLS/Claw Dec. 5, 1961 J. c. DANLY ET AL 3,011,464

TRANSFER FEED ASSEMBLY Filed March 22, 1956 8 Sheets-Sheet 8 AP LE i3 o6o 12o IBO 40 oof 360 POSITION OF STRGKE IN DEGREES INVENTORS JMEs C.DHA/Y VHS/1 @EOQGEFF BMM A ORNEY United lStates Patent G 3,011,464TRANSFER FEED ASSEMBLY f James C. Danly, River Forest, and VasilGeorgeir', La

Grange Park, Ill., assignors to Danly Machine Specialties, Inc.,Chicago, Ill., a corporation of Illinois Filed Mar. 22, 1956, Ser. No.573,201 3 Claims. (Cl. 113--38) Our invention relates to a transfer feedassembly for simultaneously advancing a plurality of work pieces fromstation to station on a multistation press and more particularly to atransfer feed assembly which has a loW moving mass and which is simplein operation.

The nature of many piece parts which are formed on a power press is suchthat they cannot be made in a single stamping operation but must befabricated in a number of progressive punching or stamping operations.In Order to form such parts, multistation presses carrying a pluralityof dies located at spaced stationsV simultaneously perform successiveoperations on a number of piece parts, each of which is in a respectiveprogressive stage of its formation from a work blank to a finished part.For efficient operation of a multistation press, automatic means must beprovided for stepping the parts from station to station betweensuccessive punching or drawing strokes of the press.

Transfer feed assemblies are known in the prior art for stepping workfrom station to station on a multistation press. Each of these transferfeed assemblies has a large moving mass, with the result that theassembly drive consumes a large amount of power. These assemblies of theprior art employ complicated drives to provide the necessary transverseand longitudinal motions of the feed. Owing to their complicatedconstruction, these assemblies are expensive to construct. Since theassembly drives consume large amounts of polwer, they are expensive tooperate. The assemblies employ intermittent drives to feed the workpieces in synchronization with press operation. Because of the highinertia of the llarge moving mass of the prior artv assemblies, theyhammer as they intermittently feed. The intermittent stopping andstarting of the drive to overcome the high inertia of the moving massadd to the high power consumption.

We have invented a transfer feed assembly for simultaneously advancing aplurality of work pieces from station to station on a multistationpress. Our feed assembly has a low moving mass. Consequently, its driveconsumes appreciably less power than transfer feed assembly drives ofthe prior art. Our assembly is 'simpler in construction than those ofthe prior art and is, therefore, less expensive. We have arranged ourassembly so that all Work carriers are actuated from one continuouslyrotating shaft to provide the required transverse and longitudinalmotions. Since the drive for our transfer feed assembly is continuous,an excessive amount of power is notconsumed in stopping and startingelectrical equipment. y

One object of our invention is to provide an improved transfer feedassembly which has a low moving mass.

Another object of our invention is to provide an improved transfer feedassembly which is simple in construction and in operation.

A further object of our invention is to provide an improved transferfeed vassembly in which all parts are driven from one continuouslyrotating shaft.

Other and further objects of our invention-will appear from thefollowing description. t

In general our inventionV contemplates the provision of a transfer feedassembly including a pair'of feed bars mounted for transverse andlongitudinal sliding move- 3,011,464 Patented Dec. 5, 1961 ice ment onthe assembly frame. At spaced locations along the length of the feedbars, we mount pairs of opposed work grippers or carriers, one of eachvpair of'which is carried by va respective feed bar. The space betweenadjacent pairs of work carriersalong the length of the bars is equal tothe distance separating the centers of adjacent work stations on themultistation press with which our assembly is used. We provide atransverse drive mechanism for reciprocating the feed bars toward eachother alternately Ato grip work pieces between the pairs of carriers andto release the work pieces from the carriers. We provide another drivemeans for reciprocating the feed bars longitudinally through thedistance separating adjacent pairs of carriers. Both the transverse andlongitudinal drives are operated from a single continuously rotatingshaft. The composite motion of the-feed bars is synchronized with thepress operation.

` f In the accompanying drawings which form part of the instantspecification and which are to be read in conjunction therewith and inwhich like reference numerals are used to indicate like parts in thevarious views:

FIGURE l is a side eleva-tion of ourtransfer feed assembly.

FIGURE 2 is a top plan view of our transfer feed assembly with someparts removed and other parts broken away, taken along the line 2-2 ofFIGURE l.

FIGURE 3 is a sectional view of the transverse and longitudinal drivemechanisms of our transfer feed assembly drawn on an enlarged scale.

FIGURE 4 is a sectional view of the transverse and longitudinal drivemechanisms of our transfer feed assembly taken along the line 4-4 ofFIGURE 3.

FIGURE 5 is a plan View of the transverse and longitudinal drivemechanisms of our transfer feed assembly taken along the line 5-5 ofFIGURE 3.

FIGURE 6 is a sectional view of one form of the blank feedingmechanisms, drawn on an enlarged scale, which may be employed with ourtransfer feed assembly.

FIGURE 7 is a sectional view of the blank feeding mechanism of ourItransfer feed assembly taken along the line 7-7 of FIGURE 6.

FIGURE 8 is a sectional view of the blank feeding mechanism of ourtransfer feed assembly taken along the line 8--8 of FIGURE 6.

FIGURE- 9 is a top plan view of the blank feeding mechanism of ourtransfer feed assembly, with parts removed.

FIGURE 10 is a fragmentary plan view of the shuttle of our blank feedingmechanism, drawn on an enlarged scale, with a part in section.

FIGURE 11 is a fragmentary sectional view of the shuttle of our blankfeeding mechanism taken along the line 11-11 of FIGURE 10.

FIGURE 12 is a fragmentary view, with parts in sec.- tion, of theshuttle blank feeding mechanism of our grip feed.

FIGURE 13 is a diagrammatic view showing the relationship of thetransverse and longitudinal motions of our grip feed to the operatingstroke of the press. t

More particularly referring now to FIGURES l and 2 of the drawings, ourtransfer feed assembly, indicated generally by the reference character10, includes four upright supports 12, 14, 16, and 18 carrying a table20. We mount a pair of spaced feed bars 22 and 24 on table 20 fortransverse and longitudinal sliding movements. We provide table 20 withyan opening 26y for permitting the drawing slide Vdies (not shown)carried by the die holders 15 of the upper slide 13 of the press withwhich our assembly is used to move into cooperative relationship withdies 17 carried by the bed 28 of the press. It will readily beappreciated that each of the It is toA be noted that we form bars 22 and24 as channel bars from lightweight material such as magnesium or thelike. Owing to this construction our assembly has a verylow moving mass.Carriers 32 and 36 may valso be formed of a lightweightV material. Wearrange the carriers 32 and 36 in'spaced pairs along the length of feedbars 22 and 24. The space between adjacent pairs of carriers is equal tothe distance separating the centers of a pair of adjacent dies. It is tobe noted that the shape of respective pairs of carriers 32 and 36changes alongthe length of the feed bars. rll`his is to aecomrnodate thechanging shape of the work piece as operations' are progressivelyperformed on it during the press operations.

Referring now to FIGURES l to 4, a plurality of bolts 37 secure ahousing indicated generally by the reference character 38 to thesupports 12 and 14. A shaft 40, driven by any convenient means (notshown) from the main drive shaft of the press with which our assembly isused, is -connected by a flexible coupling 42 to a shaft 44.l A pair ofbearings 46 and 4S carried by an auxiliary housing 50 on a side 52 ofhousing 38 rotatably support shaft 44. A worm 54 carried by shaft 44 forrotation with it drives a pinion 56 carried by a shaft 58 for rotationwith it. Pinion 56 meshes with and drives a gear 60 carried by a .shaft62 for rotation with it. A number of bearings 64, 66, and 68, carriedrespectively by the back 70 of housing 38, a support plate 72 withinhousing 38 and the front 74 of housing 38, rotatably support shaft 62Within the housing. Any convenient means such as a key 76 or the likesecures a barrel cam 78 on shaft -62 for rotation therewith. We formbarrel cam 78 with a cam track 80. A pair of depending supports 82 and84 formed in the top 86 of housing 38 carry a fixed shaft 88. A bushingor the like 90 on shaft 88 pivotally supports a lever 92, one end ofwhich carries a cam follower 94 disposed in the track 80 of barrel cam78. A pin 96 pivotally connects the end of lever 92 remote from follower94 to a drive link 98. We dispose a drive bar 100 in the end of link 98remote from pin 96. We secure a pair of drive members 102 and 104 to therespective feed bars 22 and 24 by any convenient means such as welding.Each of the members 102 and 104 is formed with a cylindrical recessorkbore 106 adapted to receive one of the respective ends of the drivebar 100.

It is to be noted that in the open position of feed bars 22 and 24 asshown in FIGURE v4 the drive bar 100 extends only a short distance intobores 106. When the feed bars are moved toward each other to clamp workpieces between the pairs of carriers 32 and 36, bores 106 cover agreater portion of the drive bar 100.

From the structure thus far described, it will be seen that as shaft 40rotates, it drives worm 54 to drive pinion 56 whichy drivesfgear 60 torotate shaft 62. As shaft 62 rotates, barrel cam 78 oscillates arm 9 2to reciprocate link 98. The reciprocating motion of link 98 drives bar1100 to reciprocate members 102 and 104 and feed bars 22 and 24 byreason of the driving engagement between the ends of rod 100 and themembers 102 and 104. It is to be noted that the driving connectionbetween bar 100 and the feed bars 22 and 24 permits transversereciprocation of the bars while the feed bars 22 and 24 reciprocatelongitudinally.

Referring to FIGURES 3, 4, and 5, any convenient means such as a key orthe like 108 fixes a second barrel cam 110 on shaft 62 for rotation withit. We form cam 110 with a track 112. A pair of bushings 114 and 116disposed in respective supports 118 and'120 carried by housing 38pivotally mount a vertical shaft 122. Any 'suitable'means such as a nut124 threaded on an end of shaft 122 secures the hub 126 of a crank arm128 on shaft 122 for rotation with it. A pin 130 pivotally mounts a camfollower Vroller 132 on the end of crank arm 128remote from hub 126.Follower 132 is disposed in track 112 so that as barrel cam 110 rotates,arm 128 oscillates to oscillate shaft l122. A pair of slide rods 134 and136, supported by any convenient means in the sides of housing 38,slidably support a pair of slides 138 and 140 for sliding movementtransversely of the assembly. Each of the slides 138 and 140 carries apair of feed bar rods 142 and 144. Each pair of rods 142 and 144 passesthrough 'a pair of bores in one of the respective members 102 and 104slidably to support the member for longitudinal movement. Any convenientmeans such as a nut or the like 146 threaded on the end of shaft 122remote from nut v124 secures a crank 148 on shaft 122 for rotation withit. Respective pins 150 and 152 connect the arms of crank 148 to links154 and 156. Respective pins 158 and 160 pivotally connect links 154 and156 to slides 138 and 140.

It will be seen that as barrel cam 110 rotates, cam track 112 actuatesfollower 132 to oscillate the crank 128 and shaft 122. As the shaft 122oscillates, links 154 and 156 reciprocate slides 138 and 140transversely of the assembly. Owing to the engagement between slides 138and 140, and the respective members 102 and 104 provided between pairsof rods 142 and 144, members 102 and 104 and the feed bars 22 and 24-carried thereby reciprocate with slides 138 and 140. Thedriving-connection between slides 138 and 140 permits the feed bars tobe reciprocated longitudinally of the assembly while being driventransversely of the assembly.

As can be seen in FIGURE 5, shaft 58 extends from housing 38 to a secondhousing, indicated generally by -the reference character 162, xed onsupports 16 and 18 at the end of the assembly remote from housing 38.The shaft 58 may be rotatably supported by any convenient means such asbearings, one bearing 164 of which is shown in FIGURE 5, carried by therespective housings 38 and 162. We fix a second pinion 166 on shaft 58for rotation with it. This pinion 166 drives a gear 168 disposed inhousing 162. Respective bearings 170 and 172 carried by housing l162rotatably support 'a shaft 174. Any convenient means such as a key orthe like 176 xes a barrel cam 178, shown .in FIGURE 3, on shaft 174 forrotationwith it. Means such as screws 180 secure gear 168 to the hub ofcam 178. As shaft 58 rotates,

- pinion 166 ydrives gear 168 to rotate shaft 174 and the barrel cam178. We provide cam 178 with a cam track 182 identical with the track112 in cam 110. A pair of bushings 184 and 186 carried by respectivesupports 188 and in housing 162 rotatably support a Vertical shaft 192.A nut or the like 194 threaded on an end of shaft 192 secures a crankanm 196 on shaft 1792 for rotation with it. A pin 198 carried by arm 196pivotally supports a cam follower roller 200 disposed in track 182. Anut or the like 202 threaded on the end of shaft 192 remote from nut 194secures a crank 204 on shaft192 for rotation with it. As shaft '58rotates, pinion 166 drives gear 168 to rotate shaft 174 and barrel cam178. As cam 178 rotates, it oseillates crank arm 196 to oscillate shaft192 and the crank 204 carried by the shaft. Respective pins 206 and 208connect the arms of crank'204 to respective slide drive links '210 and212. Respective pins 214 and 216 connect the ends of links 210 and'212remote from pins 206 and 208 to slides 218 and 200 mounted fortransverse sliding movement on rods 222 and 224 supported by housingr162. Each of the slides 218 and 220 carries a pair of rods 2:26 and228. Each pair of rods 226 and 228 passes through bores in a respectiveone of a pair of feed bar drive members 230 and 232 xed to the undersideof respective feed bars 22 and 24 by any convenient means such aswelding or the like.- It Will be seen that the mechanism housedbyhousing 162 forms a slide 'transverse drive identical with the slidetransverse drive tion on the assembly.

disposed in housing 3-8. Thus we provide two transverse drive meansadjacent the respective ends of our assembly for reciprocating feed bars22 and 24 transversely of the assembly. The construction of these drivesis such that they reciprocate the feed bars transversely whilepermitting longitudinal reciprocation of the bars. I

rPhe feed bar motions provided by the respective longitudinal andtransverse drives can best be seen by reference to FIGURE 13. In thefigure the curve A represents the motion of the drawing slide of thepress with which our assembly is used in performing a punchingoperation. The transverse motion of the feed bars 22 and 24 is indicatedby the curve B, while the longitudinal motion of the feed bars isindicated by curve C. The curves indicate the respective positions ofdrawing slide and feed =bars in the course of one revolution of the maindrive shaft of the press with which our assembly is used. During theportion of the press drawing slide stroke of from approximataely 285 toabout 75, t-he feed bars are in clamping position. During this periodthe longitudinal feed bar drive advances the work blanks from left toright through a distance equal to the distance between centers ofsuccessive stations on the press. kDuring the period of from about 75 to125 the feed bars are operated to release the work pieces. Thelongitudinal drive dwells from about 75 to 105 to permit the work to beunclamped. From'125 to 235 the transverse drive dwells to-permit thepress drawing slide to perform its drawing operation. When the drawingoperation is complete, the feed bars are again moved to clampingposition. During the time when the feed bars are out of clampingposition and when the drawing operation is being performed, thelongitudinal drive returns the feed bars to the initial posi- It is tobe understood that the transverse and longitudinal motions of the feedbars may readily be varied as required merely by replacing cams 78, 110,and 178 with cams having appropriately shaped tracks. y We provideautomatic means for feeding workk blanks to the first pair of carriers32 and 36 on feed bars 22 and 24. Referring now to FIGURES l and 7 to12, housing 38 supports by any convenient means such as bolts or thelike a blank feeding mechanism housing, indicated generally by thereference character 234. A pair of guides 236 and 238 fixed to the sidesof housing 234 slidably support a -blank feeding shuttle 240. We formshuttle 240 with a pair of openings 242 and 244 into which the feed bars22 and 24 extend. We form the base of each of the openings 242 and 244with a slot 246. Respective bosses 248 and 250 formed on the undersideof the respective feed bars 22 and 24 lie in slots 246. From the.foregoing it will be seen that as the bars 22 and 24 reciprocatelongitudinally of the assembly, they reciprocate shuttle 240 by reasonof the engagement of bosses 248 and 250 in slots246. This drivingconnection between the vshuttle 240 and the feed bars 22 and 24 permitsthe bars vto be reciprocated transversely while being drivenlongitudinally. We form the top 252 of housing 234 with an opening 254through -whioh a plurality of work blanks 256 pass to the shuttle 240.We form shuttle 240 with a forwardly extending portion 25-8 whichextends into a slot 2-60 formed in a blank transfer table 262 carried byany convenient means in housing 234. To avoid confusion, the det-ails ofthe portion 258 of shuttle 240 and the slot 260 have not been shown indetail in FIGURES 1 and 2. Slot 260 serves as a guide for the shuttle240.

`As can be seen by reference to FIGURES 9 to 12, shuttle 240 and theytransfer table 26-2 intermesh as indicated .generally at 261 so that thetable supports a blank removed from the stack. of blanks 256 to permitit to be gripped by the first pair of grippers.

Referring now to FIGURE 10, shuttle 240 is formed with a semicircularblank engaging raised portion 264.

'When the shu-ttle is in its eXtreme left-handk position as viewed inFIGURES 6 and 9, the lowest blank in the 6 stack of blanks 256 isengaged by portion 264. When the shutttle travels from this position inthe direction of feed of our transfer feed assembly, it carries thelowest blank in the stack out to a position on transfer table 262 whereit may be gripped by the first pair of grippers 32 and 36.

Top 252 is formed with a pair of recesses 266 through which a pin 268passes. Pin 268 pivotally carries a pair of blank retaining pawls 270.Leaf springs 272 normally urge pawls 270 in a direction toward table262. These pawls 270 engage a blank fed from stack 256 to prevent theblank from being drawn back into the stack when the shuttle returns. Top252 also carries a limit switch 274 having thickness measuring arm 276carrying a blank engaging roller 278. When more than a single blank isaccidentally fed from the stack of blanks 256 by shuttle 240, the arm276 of switch 274 moves toA a position where the switch is actuated.Switch 274 may be connected into the press drive circuit to interruptthe circuit when two blanks are accidentally fed. We provide means forlifting all but the lowest of the blanks 256 in the stack when shuttle240 is to feed the lowest blank.

Referring now to FIGURES 6, 7, and 9, it will be seen that shaft 62extends from housing 38 into housing 234. Any convenient means such as akey or the like 280 fixes a cam 282 on shaft 62 for rotation with it.vvOne side of housing 234 is formed with a lug 284 carrying a pin 286which pivotally mounts a lever 288. The end of lever 288 remote from pin286 pivotally mounts a cam follower roller 290 by means of a pin 292. jAs cam 282 rotates, it oscillates lever 288 about pivot pin 286. A pinor the like 294 carried by lever 288 pivotally connects the lever to alink 296. A pin 298 pivotally connects link 296 with a pair of links 300and 302 pivotally connected by respective pins 304 and 306 to stackgripping fingers 308 and 310. An adjusting turnbuckle 312 pivotallyconnected by respective pins 314 and 316 to fingers 308 and 310 governsthe distance between the pivot points of fingers 308 and 310. The back70 of housing 38 c-arries a pair of guides 318 and 320.

When cam 282 drives lever 288 in a clockwise direction about pivot 286,it drives pivot 298 upwardly. Housing back 70 carries a guide 322 whichconstrains pin 298 to move in a vertical direction. As pin 298 movesupwardly, fingers 308.1and 310 ten'cl to rotate about their respectivepivots 314 and 316 in aldirection to move the upper ends of fingerstoward each other. `rThis movement is prevented by the lstack of blanks256, with the result that the stack is gripped by the fingers. 'Ihearrangement of the fingers is such that the stack is gripped at a pointjust above the lowest blank in the stack on shuttle 240. Thus, thisblank may be drawn out from under the stack by the shuttle to a positionto be gripped by the first pair of work carriers 32 and 36 when the feedbars move toward each other. l

In opera-tion of our transfer feed assembly, a stack of work blanks 256is placed over the opening 254 in the top 252 of housing 234. From aninitial position of the elements, the press drawing slide begins to movefrom its bottom dead center position -toward its top dead centerposition. During this motion of the drawing slide, feed bars 22 and 24are open and are returned to their extreme left-hand position as viewedin FIGURES l and 2. When the feed bars arrive at their left-handposition, or position from which a feed is to begin, shutttle 240 hasmoved to a position where its raised portion 264 may engage the -lowestblank 256 in the stack. At this time the cam 282 actuates lever 288 tolift the stack of blanks by means .of fingers 308 and 310. When the`stack is lifted and the feed bars move from left to right as viewed inFIGURES l and 2, shuttle 240 carries the lowest blank out of the stackto a position to be gripped by the first Vpair of carriers 32 and V36.Rawls 270 retain the advanced blank in ythis position. As a result ofthis operation, a fresh blank is always in position to be gripped by thefirst pair of carriers at the beginning of a feeding operation.

When the bars 22 and 24 arrive at the position from which a feed is tobegin, they move toward each other to grip the work pieces at eachstation of the press between carriers 32 and 36. During this period ofmovement of the bars toward each other, the longitudinal bar drivedwells to permit the clamping action to take place. Once the bars moveto clamping position, their longitudinal feed moves the bars from leftto right. During this longitudinal movement of the bars, the transversedrive dwells yuntil the work pieces have been moved through a distanceequal to the distance between the centers of a pair of successivestations. These motions can best be seen by reference to FIGURE 13.After the movement of the bars from left to right as viewed in FIGURES lIand 2, the longitudinal drive dwells and the transverse drive moves thebars 22 and 24 away from each other to lunclamp the work pieces. It isto be under stood that during this feeding movement of the bars, thepress drawing slide moves up through its top dead center position andbegins its downward or drawing stroke. After the work pieces have beenunclamped, the transverse bar drive dwells and the longitudinal drivereturns the bars for the next feeding operation while the press drawingslide performs its drawing stroke. The shuttle 240 and the stack liftingmechanism release the stack during this return movement.

It is to be understood that as many press stations may be provided asare required. While we have shown and described a particular mechanismfor feeding work blanks to the first pair of work carriers, it is to beunderstood that other means may be employed to accomplish this feed. Itis to be noted further that there may be a number of idle stations inthe feeding assembly to permit oiling and other similar operations. Thefinished work pieces may be carried away from the assembly by anyconvenient means such as a delivery chute.

It will be seen that we have accomplished the objects of our invention.We employ a simple barrel cam drive which avoids the complicatedgearings used in assemblies of the prior art. Since our assembly issimpler than those of the prior art, it is less expensive. Our assemblyhas a small moving mass having a low inertia. It is less expensive tooperate than assemblies of the prior art. Since the moving mass has alow inertia, our assembly does not have the tendency to hammer, which ispresent in assemblies of the prior art. Our assembly is driven from asingle continuously rotating shaft. It does not require I the powerconsuming intermittent drives of the prior art.

It will be understood that certain features and snbcombinations are ofutility and may be employed Without reference to other features andsubcombinations. This is contemplated by and is within the scope of ourclaims. It is further obvious that various changes may be made indetails within the scope of our claims without departing from the spiritof our invention. It is therefore to be understood that our invention isnot to be limited to .the specific details shown and described.

Having thus described our invention, what we claim is:

l. A transfer feed assembly for a power press having a pair of spacedstations at which respective `drawing operations are to be performed ona workpiece including in combination a frame, a pair of feed bars havingaxes extending in the direction of feeding, a pair of slide rods, meansmounting said slide rods on said frame with their axes extending atright angles to the direction of feeding, a pair of guide rods, meansslideably mounting said guide rodson said slide rods with their axesextending in the direction of feeding for movement along said sliderods, means mounting said feed bars on said guide rods for movementalong said rods, a drive bar extending transversely of said feed bars,means mounting said drive bar on said feedV bars for movement of saidfeed bars along said drive bar, a pair of fingers, means mounting afinger of said pair on each feed bar to engage stampings formed fromsaid workpieces, a shaft driven by the press, means mounting said shaftfor rotary movement on the press, a cam carried by said shaft forrotation with the shaft, a lever pivoted on said frame intermediate itsends, a cam follower carried by one end of said lever and adapted tocoact with said cam, a drive link connecting the other end of said leverto said drive bar, said cam being formed to actuate said follower tooscillate said lever to cause said link to reciprocate said barslongitudinally to move said fingers from one of said stations to theother of said stations and from said other station to said one stationand drive means including said shaft for moving said guide rods towardand away from each other to impart transverse reciprocating motion tosaid bars to cause said fingers to engage a stamping at said firststation and to release said stamping at the other station.

2. A transfer feed assembly for a power press having a pair of spacedstations at which respective drawing operations are to be performed on aworkpiece formed from a blank including in combination a frame, a pairof feed bars having axes extending in the direction of feeding, meansmounting said feed bars on said frame for movement in the direction offeeding and for movement transversely of the direction of feeding, adrive bar extending transversely of said feed bars, means mounting saiddrive bar on said feed bars for movement of said feed bars along thelength of said drive bar, a pair of fingers, means mounting a finger 0fsaid pair on each feed bar to engage stampings formed from saidworkpieces, a shaft driven by the press, means mounting said shaft forrotary movement on the press, a cam carried by said shaft for rotationwith the shaft, a lever pivoted von said frame intermediate its ends, acam follower carried by one end of said lever and adapted to coact withsaid cam, a drive link connecting the other end of said lever to saiddrive bar, said cam being formed to actuate said follower to oscillatesaid lever to cause said link to reciprocate said feed barslongitudinally to move said fingers from one of said stations to theother of said stations and from said other station to said one station,drive means including said shaft for imparting transverse reciprocatingmotion to said feed bars to cause said fingers to engage a stamping atsaid first station and to release said stamping at the other station,means for supporting a stack of blanks to be fed to said fingers, ashuttle adapted to be driven to feed the lowermost blank in said stackto said pair of fingers and means responsive to the operation of saidlever for reciprocating said shuttle.

3. A transfer feed assembly for a power press having a pair of spacedstations at which respective drawing operations are to be performed on aworkpiece formed from a blank including in combination a frame, a pairof feed bars having axes extending in the direction of feeding, meansmounting said feed bars on said frame for m0vement in the direction offeeding and for movement transversely of the direction of feeding,'adrive bar extending transversely of said feed bars, means mounting saiddrive bar on said feed bars for movement of said feed bars along thelength of said drive bar, a pair of fingers, means mounting a finger ofsaid pair on each feed bar to engage stampings formed from saidVworkpieces, a shaft driven by the press, means mounting said shaft forrotary movement Von the press, a cam carried by said shaft for rotationwith the shaft, a lever pivoted on said frame intermediate its ends, acam follower carried by one end of said lever and adapted to coact withsaid cam, a drive link connecting the other end of said lever to saiddrive bar, said cam being formed to actuate said follower to oscillatesaid lever to Vcause said link to reciprocate said feed barslongitudinally to move said fingers from one of said stations to theother of said stations and from said other station to said one station,drive means inciuding said' shaft for imparting transverse refr`ciprocating motion to said feed bars to cause said fingersV to engage astamping at said first station and to release said stamping at the otherstation, means for supporting a stack of blanks to be fed to saidlingers, a shuttle adapted to be driven to feed the lowerrnost blank insaid stack to said pair of ingers, means responsive to the operation ofsaid lever for reciprocating said shuttle to feed the lowerxnost blankfrom said stack to said pair of iingers and means responsive to theoperation of the press `for lifting the blanks above said lowermostblank in the course of a blank feeding operation.

References Cited in the iile of this patent How to Feed Presses, Am.Machinist, Nov. 20, 1947,

UNITED STATES PATENTS lCarbone May 30,

Paull May 8,

Nilsen Feb. 16,

Rotherham June 10,

Longfield May 19,

FOREIGN yPATENTS Italy Mar. 3l,

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